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Apc backups ms 600

Steady high pitched noise after a power sag in electricity

Posted by Anonymous on

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Youe devices should not exceed the ratings of the UPS. Example maximum load is 600 watts then the sum of the power of your devices connected to the backup side should not exceed 600. If the unit is more than 2 years old the batteries should be replaced. As mentioned before Laser Printers have a very large surge on the backup and should not be backed up. They should be hookup to normal side or another outlet.

Posted on Jan 18, 2015

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Why don't you replace the battery

Posted on Jan 16, 2015

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Posted on Jan 02, 2017

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SOURCE: APC ES350 strange noise

My solution was to unplug everything, hit the reset button, and then power the unit back up. The problem I found to be that I had my laser printer connected to the "surge + battery" side, and for some reason no laser printer can be connected to it.

Posted on May 28, 2009

  • 28 Answers

SOURCE: APC passes its self test but no backup

More than likely it is the battery. These units simply test the voltage during the self test, and, although not typical, the battery voltage could be good without a load, but fail with a load. 3 years is generally the life span of SLA batteries. Replacement batteries are fairly inexpensive and can be found at: http://batteryinternational.com/ups-batteries-apc-batteries.html

Posted on May 25, 2010

Martyn01202
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SOURCE: APC power supply. My backup power supply "online"

How old is the unit? They only last so long before the battery can charge no more.

Posted on Dec 30, 2010

  • 1684 Answers

SOURCE: Continous whine sound on APC Surge Protector 600

Hello Glen,

Yes, The batteries in UPS systems have a 2.5 to 3 year life span so your unit does need new batteries. The whine is usually caused by the charge circuit trying to push the charge to the damaged cells in the battery. You should be able to get replacement batteries from your local battery dealer, no need to order "special" UPS batteries. Open your UPS cover and remove the old battery and bring it to the dealer and they will match it to their stock.

Posted on Jul 20, 2012

Testimonial: "Thank you Mcsparrin, your advice led me to realize that what I needed was a new backup battery, which I did order. You were very helpful and I do appreachate your help. Best Wishes, Glen"

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My apc surge protector back up ES 650 has a high pitch sustained high ring for the past day.


1st I see you posted this question in the Printers area. You should not plug printers, particularly Laser Printers, into a UPS. Surge suppressor is fine just not the battery backup. Depending on the age of the APC, you may need to replace the batteries. You may also try turning off the entire unit then pressing the reset and turning it back on.

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follow this steps and fix it. God bless you
Plug the battery backup into a working electrical outlet. If the battery backup turns on when the power button is pressed, then the problem may be that the previous electrical outlet is faulty. Proceed to step three. If the battery backup doesn't turn on, proceed to step two.
  • 2 Reset the circuit breaker on the battery backup. APC battery backups have a labeled circuit breaker button located on the unit near the phone line, fax line, USB, network and coaxial cable inputs. Press the button to reset the circuit breaker. Power on the battery backup by pressing the power button. If the battery backup powers on, proceed to step three. If the battery backup doesn't turn on, proceed to step six.

  • Read more: http://www.ehow.com/how_7266444_troubleshoot-apc-battery-backup.html#ixzz2lwOvPO75
  • 3 Determine if the battery backup is charged and providing battery power. With the battery backup on and plugged into a working electrical outlet, plug a computer monitor into one of the battery backup outlets labeled "battery backup plus surge protection" on the battery backup. (APC power supplies have some outlets that provide only surge protection while the other outlets provide surge protection plus battery backup.) Turn the monitor on. Unplug the battery backup power cord from the wall outlet. If the monitor remains on, the battery is holding a charge, supplying electrical power and the battery backup is working properly. If the monitor goes off, proceed to step four.
  • 4 Charge the battery. Plug the battery backup into an electrical outlet and allow the battery to charge for 16 hours. This will fully charge the battery.
  • 5 Test battery charge. Once the battery is fully charged, repeat step three. If the monitor stays on when power is interrupted to the battery backup, the issue is solved and the problem resulted from an incompletely charged battery. If the monitor turns off when power is interrupted, the battery within the battery backup is faulty and needs to be replaced.
  • 6 Replace the battery backup unit. The unit itself is faulty. If the battery backup is under warranty, contact APC to request a replacement.
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    APC SmartUPS X (SMX1000)- "AVR Relay Weld" error message


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    Continous whine sound on APC Surge Protector 600


    Hello Glen,

    Yes, The batteries in UPS systems have a 2.5 to 3 year life span so your unit does need new batteries. The whine is usually caused by the charge circuit trying to push the charge to the damaged cells in the battery. You should be able to get replacement batteries from your local battery dealer, no need to order "special" UPS batteries. Open your UPS cover and remove the old battery and bring it to the dealer and they will match it to their stock.

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    APC passes its self test but no backup


    More than likely it is the battery. These units simply test the voltage during the self test, and, although not typical, the battery voltage could be good without a load, but fail with a load. 3 years is generally the life span of SLA batteries. Replacement batteries are fairly inexpensive and can be found at: http://batteryinternational.com/ups-batteries-apc-batteries.html

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    UPS shuts off intermittently and beeps


    More than likely it just needs a new battery. If the power is sagging (called a brownout) the UPS is trying to switch over to the battery to keep the power consistent. The beeping is probably a code that indicates there is an issue with low voltage on the battery. New batteries are around $20-25. Here's a link to the replacement battery: http://batteryinternational.com/apc-backups-es-be350es-ups-battery-ups-batteries-f1.html

    Hope that helps.

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